Function Test And Alignment Procedure - ViewSonic VP171 Service Manual

Function Test and Alignment Procedure

5-6
5-6.1 All Modes Reset
You should do “All Mode Reset” (Refer to Chapter 5-3) first.
This action will allow you to erase all end-user’s settings and restore the factory defaults.
5-6.2 Auto Image Adjust
Please select and enter “Auto Image Adjust” function on Main Menu to see if it is workable. The “Auto Image
Adjust” function is aimed to offer a better screen quality by built-in ASIC. For optimum screen quality, the user has
to adjust each function manually.
5-63 Firmware and DDC
Test Pattern: Burn In Mode (Refer to Chapter 5-3)
- Make sure the F/W is the latest version.
- Make sure the S/N is the same as the Spec. label.
- Make sure the model name is correct.
5-6.4 Fine Tune and Sharpness
Test Signal: 1280*1024@60Hz
Test Pattern: Line Moire Pattern
- Check and see if the image has noise and focus performs well.
eliminate visual line bar.
- If not, readjust by the following steps :
(a) Select and enter “Fine Tune” function on “Manual Image Adjust” to adjust
the image to eliminate visual wavy noise.
(b) Then, select and enter “Sharpness” function to adjust the clarity and focus
of the screen image.
5-6.5 Boundary
Test Signal : 1280*1024@60Hz
Test Pattern : Horizontal & Vertical Line Thickness Pattern
- Check and see if the image boundary is within the screen frame.
- If not, readjust by the following steps :
(a) Select and enter “Manual Image Adjust” function on OSD Main Menu.
(b) Then, select and enter “Horizontal Size” or “Horizontal/Vertical Position”
function to adjust the video boundary to be full scanned and within screen frame.
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